Chalk box



FIG. 1 is a top, side, end view of the chalk box according to the present invention with the chalk lines which form no part of the design shown in phantom;

FIG. 2 is a right side view of the chalk box;

FIG. 3 is a top view of the chalk box;

FIG. 4 is a left side view of the chalk box;

FIG. 5 is a bottom view of the chalk box;

FIG. 6 is a rear view of the chalk box; and,

FIG. 7 is a front view of the chalk box. 

The ornamental design for a chalk box, as shown and described. 